US PATENT SUBCLASS 73 / 645
.~.~ Acoustic parameter

Current as of: June, 1999
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73 /   HD   MEASURING AND TESTING

570  DF  VIBRATION {10}
584  DF  .~ By mechanical waves {13}
645.~.~ Acoustic parameter {1}
646  DF  .~.~.~> Amplitude, power, or intensity {1}

DEFINITION

Classification: 73/645

Acoustic parameter:

(under subclass 584) Subject matter for determining sonic characteristics of the sonic waves in a medium.

(1) Note. Included herein are means for determining a frequency characteristic.

SEE OR SEARCH THIS CLASS, SUBCLASS:

589, for determining acoustical impedance.